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Ali Waseem 5297eeaf80 feat(www): add version selector to legal terms pages (#45431)
## Summary
- Adds a reusable `<LegalDocVersions />` component (dropdown below the
page header) that swaps the active legal doc version inline via shallow
query-param routing (`?version=v1`).
- Converts `/terms` and `/enterprise-terms` from MDX to TSX pages and
moves their content into versioned MDX under
`apps/www/data/legal/<doc>/v1.mdx`.
- Seeds `v2.mdx` for both docs as a copy of v1 with the effective date
bumped to 6 May 2026 — the actual v2 language edits from legal will land
in a follow-up commit.

## Behavior
- `/terms` and `/enterprise-terms` default to v2 (latest); search
engines and bare URLs always see the latest.
- `/terms?version=v1` (and equivalent for enterprise) renders v1.
- Selecting a version updates the URL via `router.replace({ shallow:
true })` — no full page reload, browser back/forward works.
- Selecting the latest version clears the `version` query param.
- Existing `/docs/company/terms → /terms` redirect still works.
`noindex/nofollow` preserved on `/enterprise-terms` (both via meta and
the existing header rule).

## Out of scope
- The 5 v2 provision edits per agreement (lands in a follow-up once
Legal hands over the final language).
- `/privacy` and other legal pages — those keep their current pattern.

Linear:
[FE-3121](https://linear.app/supabase/issue/FE-3121/update-legal-terms-pages-and-add-version-selector)

## Test plan
- [ ] Visit `/terms` — defaults to v2, dropdown shows "Version 2 — May
6, 2026" and "Version 1 — July 11, 2025"
- [ ] Visit `/terms?version=v1` — renders v1
- [ ] Select v1 from the dropdown — URL becomes `?version=v1`, content
swaps without full page reload (no document request in Network tab)
- [ ] Select v2 — URL drops the `version` param, latest renders
- [ ] Browser back/forward steps through prior selections
- [ ] Repeat the above on `/enterprise-terms`
- [ ] Confirm `/enterprise-terms` is still `noindex, nofollow`

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Version selector and new Terms & Enterprise Terms pages allowing users
to switch between historical agreement versions.
* MDX-based legal documents now render as components for improved
content loading.

* **Documentation**
* Added v2 Terms and v2 Enterprise subscription agreements; v1 documents
adjusted and typography normalized for consistency.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-05-06 09:39:22 -06:00
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